Watson-Marlow 505LA - Manual (Page 3)

ATEX Directive: Watson-Marlow 505LA, 505LXA and 505LGA pumpheads User Manual 3
4 Operating parameters
The following tube materials can be used with the 505LA pumpheads in double “Y”
or continuous tubing configurations (two separate channels). Bore sizes range from
0.5mm to 9.6mm, with 2.4mm wall thickness. Only Watson-Marlow tubing should
be used to guarantee continued compliance with the ATEX directive.
Tubing: working temperature range
Marprene
5C to 80C
Bioprene 5C to 80C
Pumpsil -20C to 80C
STA-PURE PCS 0C to 80C
STA-PURE PFL 0C to 80C
Neoprene 0C to 80C
PVC 0C to 80C
The following parameters define the boundary of the safe working envelope - these
values must not be exceeded (ATEX compliance will be invalidated):
505LA pumpheads
Operational temperature range
-20C to 80C
Max peak pressure 2 bar *
Max continuous speed 350 rpm
Corrosion resistance
See 9 Materials of
construction
Tube life See 7 Tube life
Torque limit (drive coupling) 2.2Nm
When two or more items of ATEX equipment are combined, the permissible operat-
ing envelope will be determined by the narrowest range after considering all values
for a given parameter.
WARNING! Do not run dry for excessive periods. Roller and tubing
temperatures can exceed normal operating range.
WARNING! Do not run pumphead against a dead-end condition (closed
discharge). This can lead to excessive roller and tubing temperatures
and pressures in excess of the limits in the table above.
* Please note that, although Sta-Pure tubing is rated at 4 bar in a standard 505LG
pumphead, the ATEX version (505LGA) is limited to 2 bar.